using System;

using System.Globalization;

using System.Numerics;

​

public static class MyExtensions {

    public static T RotateDigitsLeft<T>(this T value, int count) where T : IBinaryInteger<T> {

      if (value == T.Zero)

        return T.Zero;

​

      string text = value.ToString().TrimStart('-');

​

      count = (count % text.Length + text.Length) % text.Length;

​

      char[] digits = new char[text.Length];

​

      for (int i = 0; i < digits.Length; ++i)

        digits[i] = text[(i + count) % digits.Length];

​

      string result = new string(digits).TrimStart('0');

​

      if (value < T.Zero)

        result = "-" + result;

​

      return T.Parse(result, CultureInfo.InvariantCulture);

    }

​

    public static T RotateDigitsRight<T>(this T value, int count) where T : IBinaryInteger<T> {

      if (value == T.Zero)

        return T.Zero;

​

      string text = value.ToString().TrimStart('-');

​

      count = text.Length - (count % text.Length + text.Length) % text.Length;

​

      char[] digits = new char[text.Length];

​

      for (int i = 0; i < digits.Length; ++i)

        digits[i] = text[(i + count) % digits.Length];

​

      string result = new string(digits);

​

      if (value < T.Zero)

        result = "-" + result;

​

      return T.Parse(result, CultureInfo.InvariantCulture);

    }

}

public class Program {

  public static void Main() {

    int value = -12345;

    int resultLeft = value.RotateDigitsLeft(1);

    int resultRight = value.RotateDigitsRight(1);  

    Console.WriteLine($"{value} : {resultLeft} : {resultRight}");

  }

}